Hi Everyone, Just got my tanks in this week-SWEEEEEEET- They are fantastic, HUGE Vape and GREAT Taste!! Need a quick schooling on the difference between ohm ratings. What does each provide? 1.5, 2.0, 3.0 Benefits and drawbacks along with difference between single and dual ? It would seem that dual burns hotter+ more vape, less battery time? Please help me out THANKS!!!